Several photos of what appear to be a Subaru WRX STI Spec C sedan have been captured, showing the big-winged 4-door testing on the Nürburgring. Notable differences on this model and the standard WRX STI Sedan just unveiled at the New York Auto Show, include black alloy wheels, gold brake calipers and a new front lip.

If in fact it is a Spec C model then, like its hatchback brother, it will get a long list up upgrades including, but not limited to, a more powerful 304-hp engine, lighter aluminum hood and smaller battery, plexiglass windshield and windows, stiffer springs, a larger rear stabilizer bar, stiffer sub-frame bushings and new shocks.